September 28, 2026

Where Disturbance Begins

A passion is an irrational and unnatural movement in the soul, or again, impulse in excess.

Zeno of Citium founded the Stoic school around 300 BC in Athens, teaching from the Stoa Poikile after losing his fortune in a shipwreck and turning to philosophy. Diogenes Laertius records Zeno's own definition of pathos, the emotional disturbances that trouble us, as an irrational and unnatural movement in the soul, or impulse in excess. The definition locates the trouble inside the mind's own motion, not in the shipwreck, the insult, or the loss itself. From this single insight the whole Stoic discipline of perception grows: the raw event is neutral, and it is the mind's excessive, unchecked movement toward it that turns it into suffering. Practicing this discipline means pausing at the first impression, before judgment hardens into passion, and asking whether the disturbance belongs to the world or only to the mind's reaction.

A principle of Stoicism: The Discipline of Perception →